The Allen-Bradley 1756-ENET, also cataloged as the 1756-ENET EtherNet Bridge Module, operates as a dedicated hardware component for Ethernet data communication between ControlLogix controllers and network devices within ControlLogix systems.

Model Identification

The 1756-ENET is a ControlLogix EtherNet bridge communication module designed for Ethernet connectivity between Logix controllers, chassis-based I/O modules, and external Ethernet devices. The module supports 10 Mbps Ethernet data transfer and requires Series A or Series B configuration identification during selection.

Hardware Specifications

ControlLogix Network Communication

The 1756-ENET provides Ethernet communication capability for ControlLogix chassis systems. The module transfers controller data through Ethernet connections and supports network communication between Logix processors and connected industrial devices.

The module operates through the ControlLogix backplane interface, where communication data is exchanged between the bridge module and installed controller or I/O modules. Proper network addressing, Ethernet wiring, and controller configuration are required for system operation.

Industrial Control Network Integration

Allen-Bradley ControlLogix communication modules use a standardized backplane architecture for module-to-module data exchange. The 1756-ENET requires correct firmware compatibility and chassis configuration to maintain communication functions.

EtherNet/IP and Ethernet-based communication networks require correct switch configuration, cable routing, and grounding practices. Network performance depends on the installed Ethernet infrastructure and connected devices.

Ordering Information

• 1 x Allen-Bradley 1756-ENET ControlLogix EtherNet Bridge Module
• 1 x Communication interface assembly
• Series identification must be confirmed before installation
• Compatible ControlLogix chassis and power supply are required separately

Field Installation Guidelines

Module Installation

• Install the module into a compatible ControlLogix chassis slot.
• Remove chassis power before inserting or removing the communication module.
• Verify module seating and locking tab engagement after installation.

Ethernet Connection

• Use industrial-grade Ethernet cabling suitable for the operating environment.
• Route communication cables separately from high-voltage power wiring.
• Confirm Ethernet address settings before connecting the module to the network.

System Configuration

• Verify controller firmware compatibility before commissioning.
• Configure network parameters using compatible Rockwell Automation programming software.
• Monitor communication indicators after system startup.

Frequently Asked Questions

• What is the main function of the 1756-ENET module?

The module provides Ethernet communication capability for ControlLogix systems and transfers data between Logix controllers and Ethernet-connected devices.

• What Ethernet speed does the module support?

The 1756-ENET supports a 10 Mbps Ethernet data transfer rate.

• Which ControlLogix system does this module belong to?

The module belongs to the ControlLogix platform and installs directly into a ControlLogix chassis.

• Does the module support different series versions?

Yes. The product requires Series A or Series B identification when selecting the correct module configuration.

• What is the maximum power dissipation?

The module has a maximum power dissipation rating of 13.3 Watts.

• What is the backplane current requirement?

The module requires backplane current through the ControlLogix chassis, including 900 mA at 5.1 VDC and 350 mA at 24 VDC.

• Can the module communicate without a ControlLogix chassis?

No. The 1756-ENET requires a compatible ControlLogix chassis backplane for operation.

• What installation factors affect communication performance?

Ethernet cable quality, network configuration, grounding, and correct controller settings affect communication performance.